Dynamo-electric machine.



C. W. STARKER.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED sanz?, IsIs. IIENEwED ocr. I1, I9Ia.

1,300,302. Patented Apr. 15,1919.

2 SHEETS--SHEET l.

ffy/1 w D INvENToR C. W. STARKER.

DYNANIO ELECTRIC MACHINE.

APPLICATION FILED SEPT.21,1916.

HENEWED OCT. I7. i918.

Patentfed Apr. 15

2 SHEETS-SHEET 2.

WITNESSES:

AT`ToRNEY UNITED sTATEs PATENT `rio.A

CHARLES W. STARKER, or PITTSBURGH, PENNSYLVANIA, AssIeNoIt To wEsTINGHoUsE ELECTRIC AND MANUFACTURING- COIVIPANY, A CORPORATION OF PENNSYLVANIA.

DYNAMo-ELECTRIG MACHINE. i

Specification of Letters Patent. Patented 'AIM'. 15, 1919.

original application filedV september 10, 1914, serial No. 860,974. Divided ana'thieeppiieatien iiieavseptember27, 1916, Serial No. 122,386. Renewed October 17, 1918. Serial No. 258,619.

To all 'whom t may concern: l

Be it known that I, CHARLES W. STARKER, a subject of the Emperor of Germany, and a resident of Pittsburgh, in the-county of Allegheny and State .of Pennsylvania, have invented a new and useful Improvement in Dynamo-Electric Machines, of which Athe following is a specification, this application being a division of my oopending applica-y tion, Serial No. 860,974, filed'Sept. 10, 1914.v

My invention relates to dynamo-electric machines, and it has special reference tol certain novel structural features ofthe stators of electric railway motors. Y

One of the objects of my invention is to provide an apparatus of the above-indicated character which shall ybe extremely light in weight without sacricing the electrical .operating characteristics or the mechanical strength of the machine, the parts being constructed chieiy of pressed steel.

Another object of my invention is to provide a dynamo-electric machine frame having independent split axle bearings comprising axle brackets and caps,`the brackets being non-integrally secured to the frame, whereby variations in thedistance between or 1n the relative position of the plane of the center lines of the `armature and of the axle bearings, or in the angle that the split of the axle bearing makes relative to the frame, may be readily and inexpensively effected.

A further object of my invention is to p-rovide an axle cap@ having a .relatively heavy working vportion and a lubricant-containing compartment of relatively light construction, and a gear-case supporting arm also of relatively light weight and located in a novel position.

A still further object of my invention is to so manufacture and combine they parts of a dyna1n0-electric machine frame--the majority of its members being constructed of pressed-steel-as to produce a rugged, compact, light-weight and relatively inexpensive frame, more particularly in electric railway motors.

With the above ends in view, I provide a dynamo-electric machine stator construction embodying various novel features which will be hereinafter described andy subsequently pointed out in the claims..

In the accompanying drawings, Figure l is a view, 1n front elevation, of the frame of a dynamo-electric machine constructed,

viefw of a modification of a portion of the structure shown in Fig. 2; Fig.y 4 is a plan view, with parts broken away vfor clearness,k of afportion 'of the structure shown 1n Fig.

1; and Fig. 5 is a view, in transverse section, y

taken on the line `IV5IV of Fig. V25-Figs@ 6Y and 7 are sectional views with parts broken away, of modiicatiol'lsof a portion of the structure illustrated .in Fig. y5; Fig. 8 is a View, in side elevation, of an axle cap and gear-case-supporting` armA constructed and assembled in accordancewith my invention; Fig, 9 is a view taken atvright angles tothe view of Fig. 8; and Figs. 10 and 11 are views, respectivelyV similar to Figs. 8 and 9, of a different type of axle cap that i employed on the machine.

. Referring toy thedrawings, the vstructure here showncomprises a dynamo-electric machine frame member 1, an'axle bracket 2 and a suspension bar 3. The frame member 1 comprises ka body porti-on or periph` eral magnetizable band 4 of relatively large cross-section, and substantially l.polygonal in contour, that may have a plurality of internal facial recesses l5 and openings 6 communicating therewith for suitably V,securing a plurality of main polarfprojections not shown) tothe body portion 4, a plurality` of smaller recesses 7 and communicating openings 8 for securing a plurality of interpolar projections (not shown) to the frame, kin accordance with customary practice, and' a longitudinally curved or indented portionv 9. It will be understood that,.if desired, the recessesk 5 and 7 may be omitted yand the polar projections may be disposed on the flat interior surfaces ofthe band 4. A preferably pressed-steel incasing member rfor the body portion 4 cc'mprisesan intermediate, Vsubstantially, parallel-sided, polygonal portion 10 which fits around the body por# tion, and overhanging annular end portions 11 rand l2 which may be suitably' tapered or otherwise fashioned to inclose lthe commutator end. and, the rear` end,respectively,

of an larmature (not shown) The end- 11 members not :Shown-)7 .are suitably reinforced at their edges,as by sets of rings 14 and 15which-are.respectively disposed without and within the -incasing member and which ,may be suitably secured thereto by means offrivets 16, or in any other suitable manner. The fincasing lmember Vis preferablyfformed of-twoparts whichmay be laprivetedfto-tlie-body-`portion 4 by a plurality Offrivets 16a #,(Fig. f5), or vthe parts maybe welded or otherwise suitably secured together. Fig. '3v shows another form of reinforcement, in which .a circular angle iron member 141- is suitablysecured to the frame to inclose the edges-of each end opening.

"The width vor thickness of the body portion 0r-band 4-may be'varied 'within predetermined limi-ts, according to the dimensions of Atheintermediate portion Il() of the incasing member, l as indicated bythe dotand-dash l-li-nes in Fig. 2,thereby allowing the -use 'o-ffastanda'rd size incasing member, andv a;variable body'portion to form therewiththe main magnetic circuit of the-machine, -the vcapacity and other operating characteristics of Vlthe machine being determined chiefly bythe size ofthe body portion 4, as will be understood. i

The aXle bracket 2 is preferably of pressedsteel .construction and 4has a centrally-located curved portion 17 that is adapted to fit within theouter surface of the curved portion 9 of .the frame, and thathas circular ,side portions `la'for suitably inclosing a truck aXle (not shown). The bracket alsojhas a plurality of internal recesses or pockets V"18 and a lplurality of eXternal recesses'19 adjacent thereto, the flat faces of which yare lprovided with openings 2 0 that arQdapted y for use in lconnection with the fastening of an axle cap, .hereinafter described,` to the axle bracket.

"In order to strengthenthe construction,

a reinforcing member or shoe 21 intercepts aportion of the internally-located reinforcing rings 15 4andhas a curved portion 22 to yfit around the inner surface of the curved portion 9 Vof the frame. 'Ihe axle bracket may-be secured tothe body portion 4 and Y to the incasing member lloy'means of suitable rivets .182 which are disposed within the recesses 17-and-f18, respectively, of the .bracketniiliaran'd suitableconstruction and is here shown ,as comprisingan angle barV which is suitably secured to the 'frame by means of The su'SpeIlSlOIlgbar 3 may be of any farivets.-23 midis-provided .with 'up-turned .ends 24, for purposes of convenience in in- ,stallation Y Y v y .v

y'Reference may `n`oiv`be had to Fig. 6, in which is showny a modiicati'on of the aXle- .bracket construction thatV is illustrated in Fig. 5. In order to permit of variation in .the/distance between the center line of the motor armature and the centerline of the truck 1aXle, i one -or lmore .suitable spacing vmembers or shims-25inay be-disposed interto be'described.' In Fig. 7, a shim 25a of` irregular shape, having ithe upper end ina-- terially thicker than the lower, is disposed v similarly to the shimV y25 that ,is-shown inV Figf.` In this'way, the angle which the plane of the motor-armature andaXle-bearing center lines make with a Vgiven datum plane, such as'that-ofythe bottoni side of the frame,may be varied within predetermined ilimits, or, Vin other words, the main portion of the frame -may be laterally moved, for example, raised, a certain amount relative to ther-axle bearing, as indicated'by the dimensional lines vH .and H, the 'line I-I indicating the' location vertically of the centerline of the-main frame portion or ofthe armature relative to thecenter line of the aXle bearing, when no shim or a shimcf regular-shape, as 25, is employed, andthe line H indicating the correspondinglocation when a shim of-irregular shape, asp25, is utilized. It will be understood' that a reversal of Athe -position of the shimj25 would produce an opposite relation ofthe center-lines lreferred to. Moreover, the use of the .shims 25a, effects an angulardifference in the plane of the aXle bearing ysplit without varying the construction of thea-Xie bracket. Thus, accommodations 'for differences injeither the centerlinedi'stanceA or'plane, or in the angle referred to, maybe readily effectediby making slight variations in the-construction or Varrangement of the aXle bracket without altering the construction of the main portion of the frame in any way. Either'transverse or Vlateral movement of the main frame portion relative to the. 'axle'y bracket may be easilyl accomplished by the use of the shims mentioned.

Referring now to Figs. V8 and 9, the strucassociated gear-case-supporting arm 27. The axle cap 26 comprises a suitably curved axlereceiving portion 28 of relatively heavy construction andprovided With straight end projections 28a having openings 29 for register'- ingY with the axle-bracket bolt openings ,20,

and a lubricant-containing compartment 30 which is preferably of light pressed-steel construction and which maybe secured to the portion 28 by means of suitable lsets of rivets 31 and 32, or may be welded thereto, the object being to secure a suitable liquid-tight joint. Ai sauitable'v dividing member 33 is transversely disposed in thelubricant-containing compartment 30, inv accordance with customary practice, for separatin the liquid lubricant from the waste or ot er similar material that is employed for conveying the lubricant to the axle. The compartment 30 isalso provided with a suitable cover mem-- ber or lid 34, which is preferably pivotally attached Vto the main portion of the compartment at 34a, and is held in its closed position by means of a suitable spring catch 34)? that is pivotally mounted on the wall of the compartment 30 at 35. 'V

The gear-case-supporting' arm 27 is preferably of light pressed-steel construction, and has a bifurcated base portion, the armsl 36 of which are suitably secured to the axle cap by means of the rivets 31, an opening 37 being cut into the upper wall of the base portion to allow it to straddle vthe lubricant-contain- Iing compartment 30. The other end 38 of able mechanical connection of the gear end of a gear-case (not shown),y in accordance with usual practice. The opposite, or pin-v ion, end of the gear-case may be supported in the usual manner by a projection of the `motor housing, and, inasmuch as any suitable type of housing may be employed, I have not deemed it necessary .to show or describe any particular type here.

It should be noted that, by vary-ing the above-described angle A, the position of the end portion 38 of the gear-case supporting arm, relative to the frame, may be varied to permit of vdifferent distances between the center lines of the meshing gear and pinion, thereby adapting the motor for employing a relatively wide range of gear ratios, it being understoodthat, for a fixed center-line distance, the. sum ofthe numbers of teeth of interchangeable sets of gears and pinions must remain constant. Y

Figs. 10 and 11 illustrate the type of axle cap that is employed at the commutator end of the stator frame, while Figs. 8 and 9 show the construction to be used at the opposite, or pinion, end of the frame, as will be understood from their similarity to the forms customarily employed. It will be observedthat the only difference between the axle# caps proper that are employed on the respective ends of themachine, resides in the particular.

lo-cationof a plurality of end doWel-pins 40. These pins are employed for positioning the axle brass or bushing that is vembodied in.

cess, of a separable axle-bracket having surfaces conforming to said recess and located therewithin, and means for securing the axlebracket to the frame.

2. f The combination withV a dynamo-electric machine frame having a peripheral recess, of a separable-axle-bracket located in said recess and having a plurality of internal pockets, and means located in said pockets for securing the axle-bracket to the frame.

' 3. The combination with a dynamo-electric machine frame comprising a magnetizable band `and Van incasing member respectively having longitudinally extending cooperating recesses,of a separable axle-bracketI located inthe recess and having a plurality of internal pockets, andy means located in said pockets for'securing thea'xle-bracket yto theframe.

4. The combination with a'dynamo-elec-` Y tric machine Vframe comprising a magnetizable band and a box-l1ke mcasmg member respectively having longitudinally extending cooperating recesses, of an axle bracket disposed in the recess and secured to said band and to said member.

5. The combination with a dynamo-eleci tric' machine frame, of a detachable axle bracket therefor, and means for varying the distance between the axial center lines of the frame and the bracket.

v6. The combination with a dynamo-electric machine frame havinga recess,of an axle bracket disposed in said recess, members disposed intermediate said frame and said bracket for varying the distance between theV axial center lines of the frame andthe bracket, and means for attaching the bracket to the frame. f

7. The combination with a dynamo-electric machine frame havin a' surface recess of predetermined shape, o a split axle bearsplit relative to the frame.

h a dynamo-elec-4 ing having-,a portion of its surface shaped to fit-said recess, the. location of said portion determining the position of the plane of the -8 The combination kWit V'tric machiney frame having a surface recessV of substantially cylindricalshape, ofa split aXlerbearing. having a substantially cylin-y drical surfaceqportion, the'location of said portion determining the position Vof the 11. The combination with a dynamo-elecy tric machine frame having a longitudinall` indentation in oneside thereof, of an aXle bracket fitting in saidindentation, a reinforcing plate fitting around said indentation within the frame, and means for attaching ysaid bracket to the frame and to said reinforcing plate.

12. The combination With a dynamo-elec-` tric machine frame having. an axle bracket,

of an aXle capv adapted for Vdetachable conl nection With said axle-bracket and comprising al relatively heavy axle-receiving portion, a relatively light lliibricant-containing compartment, and means for securing said compartmentfto said-portion l 13. The combination With a dynamo-electricmachine: frame having an axle-bracket secured thereto, of an aXlecap comprising a relatively,v heavy aXlereceiving portion adapted for detachable connection with said axle-bracket, a relatively lightl .lubricantcontaining compartment, and riveting means for securing said compartmentto said portion. l,

'14; Thecombination With a dynamo-electric machine frame and an aXle cap' adapted .to be attached thereto, of a gear-case-supporting arm of relatively light-Weight material, and riveting meansfor securing said arm to said aXle cap.

15..` The combination With dynamo-electric machine axle cap comprising an axlereceiving portion and a lubricant-containingV compartment, of a gear-case -supporting member `having its baseportion securedto said cap and adapted to straddle said compartment;

The .combination withV al dynamo;elec-.

tric machine aXle cap` comprising an axlereceiving portion and a lubricant-containing compartmentexternally attached thereto, of

a. gear-case-supporting arm of relatively light construction having a bifurcated base portion straddling said, compartment and non-integrallysecured to said cap..

heavy. yaxls-receiving portion and av relatively .light .lubricant-containingv compartmentv non-integrally secured thereto, of a gear-case-supporting arm fof relatively light 5 construction havingllalbifurcated base portionv straddling said compartment and non-f -v integrally secured' to said vompartment and to saidaXle-receiving portion.

18. The` combination with al dynamo-electric machine frame, of a split aXle bearing non-integrally secured thereto, and means ,1'7. The A( :ombination {Withay dynamo-elec-'lV tric machine airlecapcomprising a relatively,

for varyingvfthe positionrof the main frame portion relative'tog'said axle bearing.

119. The combination with a dynamo-electric machine frame, ofv a detachableaXle bracket therefor, V'and means for laterally varying `theposition of the main frame po-rtion relative to said axle'V bracket.

20.Y The'combi'nation With a dynamo-electric machine frame, of a split axle bearing non-integrally. secured thereto, Vand lmeans associated therewith for varying the angle' v of the `axle-bearing split relative tothe frame. Y A; i

' 21. The combination with a dynamo-electric machine frame, ofv a split axle bearing non-integrally secured thereto, and means 'I for laterally.k varyinggthe position of the mainframe portionV relative to said aXle bearing and for.l yconcurrently varying thel angle of the .a-*Xle-bearing split relative toYV the frame; i Y l 22. The combinationfvvith a dynamo-electric machine. frame, of a splitaxlebearingj non-integrally secured thereto, and 'a spacing member 'disposed intermediate' said frame and saidy bearing and adapted yto laterally vary theirrelative positionsandto vary A the angle of the axle-bearing.Splitfrelatve JUOheframe.

Y 23. The, combination Withadynamo-electric machine frame, ofl'a split axler bearing non-integrally secured thereto, a gear-casesupportingV member-,secured tol said bearing,

and means for varying. the vangle of theaXle bearing split relative to the frame'to correspondingly vary the distance between fthe outer end of said supporting member and a predeterminedportion of the framef 24. The vcombination With a dynamo-electric machine frame, of a splitaxle bearing comprising an aXle bracket non-integrally secured to the frame, and an'aXl'e cap associated With said bracket, a gear-case-sii-'p'- porting arm secured to said cap, and means the frame for permitting a variation in the disposed between said frame and Said center distances of gears and Co-acting pinbraeket for varying the angle of the aXleions. 10 bearing split relative to the frame to cor- In testimony whereof, I have hereunto respondingly Vary the distance between the subscribed my name this 22nd day of Sept., outer end of said supporting arm and a co- 1916.

operating gear case supporting portion of Y CHARLES W. STARKER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

` Washington, D. G. 

